Nut-lock



NNNNNN K.

APPLICATIO JUNE 41 1921' 1,3 98 ,4 16. Patented Nov. 29, 1921.

sta n Jenn A. satire, or MUNSON, PENNSYLVANIA.

NUT-:LOGK.

Application filed June 1, 1921. Serial No. 474,940.

1 0 (M6 whom it may concern Be it known that 1, JOHN A. Ensure, a

citizen of the United States, residing at Muns'on, in the county of Clearfield and State of Pennsylvania, have invented oer tain new and useful Improvements in Nut- Locks, of which the following is a specification, reference being iad to the accompanyinp; drawings.

This invention relates to nut, locks and has for itsobject to provide a device ofthis character arranged to look a nut on a bolt in an 1 Josition'without re uirino' the maniou-[ lation of special fastening means after th out has reached the desired point.

I It" is also an object of the invention to provide adevice of this character wherein,

the nut is provided vith a spring pressed pawl which is constantly urgedinto engagement withthe bolt, permitting movement of f the nut toward the head of the bolt, and preventing movement of the nut away from the head of the bolt.

It is another object of the invention toprovide a device of this character wherein the bolt on which the nut 1s mounted is pro of the pawl upon rotation of the nut..

It is alsoan object of the invention to proride a devlce of time character wherein the recesses interposed in the channel formed by the threads of the bolt are so constructed that one side wall of the recess is higher than the other so as to form a tooth to be engaged-by the pawl. y

it is a further object "of the invention to provide a device of this character wherein the channel formed by the threads of the bolt is deeper on one side of the recess than" on the otheiyso as to guide the pawl into en gagement with the tooth.

It isstill a further object of the invention to provide a device of this character wherein the nut is provided with an opening in which a spring pressed pawl is mounted, the opening being arranged to limit movement of the pawl toward the bolt.

With these and other objects in view the invention consists in the improved construction and arrangement parts to be hereinafter more particularly described, fully I claimed and illustrated in the accompany.-

ing' drawings in which Flgure 1 1s a view 1n elevation of a nut Specificationof Letters Patent.

- there is provided a series of recesses 'ot thelocking means with thebolt.

rates-tenant. ear-leer.

lock. constructed in accordance with an embodime'nt o1 the invention,

through the nut and bolt, and

is a perspective vlewoit the pawh Referring to the drawings, 5 designates a conventional iorm or bolt including a head 6, said bolt being provided With conven tional form of threads -7. In order to per-,

mit a nut to be locked on thebolt interfering with the threads 01 the bolt, 8 which are helically disposed longitudinally ,oi the bolt. These recesses are preferably conical in cross section and are disposed within the channel 9 formed between the threads 7 of 1 J. 1 1

the bolt. In order toeprevent dCClClElltttl movement'of the locking means of the nut,

the portion 11 of the channel 9, or in other words, the portion on the right hand side of each recess, is deeper and wider than the portion 12 of the channel on the leifthand side'oi": the recess so as to substantially form a step in the channel 9 withoutinterrupting the train of the threads 7., The wall 18 of the recess forming; the end of the portion 12 of the channel substantially provides a tooth which is interposed in thepath 0t movement oi' the lockino' means of the nut to prevent rotation of the nutto the left the bottom of the -recess 8 being disposed slightly below the portion 11.01? the channel. With this arrangement, the recesses and the portions 11 and '12 or" the channel9. substantially cooperate to form ratchet teeth helically of the bolt. v s y The nut 140i the bolt is conventlonal in form and includes the usual threaded inof the nut to the intermediate portion of the opening, the remainder of the opening, that is fronrthe intermediate portlon to the without ner wall 15 for engagementwith'the threads inner wall of the nut, being the same diameter to prevent passage of the base of the locking means or pawl entlrely through the opening, thereby hunting engagement The locking means of the nut embodies a pawl 17 which is substantially conical, the pawl beinn' slightly smaller than the opening 16 so as to permit projection of the apex 18 of I the pawl through the inner end of the openv 15, and also to permit said ing 16. The conical pawl is adapted to'conform to the shape and size of the channel 9 so as not to interfere with the engagement of thethreads .7 with the threads of the wall pawl to be directed into the recesses 8. M

The'pawl; 17 is adapted to be mounted in the opening 16, and is constantly: urged throughthe inner wall 15 by means of a spring 19 which engages the outer end of the pawl, movement of the pawl through the f apex portion of the opening 16 being limited by engagement ofthe central portion of the opening 16 with the base portion ofthe pawl. In 'order' to permit the pawl and spring to be removed when it is desired to j unlock the bolt, and. to prevent accidental 7 "means in'the form of a band 20,- which is adapted to surround'the outer faces of the spring 19 so as to permit said spring to disengagement of the pawland spring from the-nut, there is provided novel retaining ends and is securedto the nut in any suitable manner, apo-rtion of the band being adapted to engage the outer: end of the urge the 'pawlinwardly of the nut. Y 'By the novel step formation of thechannel, or ratchet teeth'formed by the end walls 13 of the recesses8, the pawl, whenthe nut is rotated to'the right, will move through the channel 9, over the portion 12 of the channel, and into the adjacent recess Continued movement of the nut to the'right will disengage the pawl from the recess 8 and-cause the same to ride over the portion 11 of the channel. This operation is repeated until the nut reaches the desired point on the bolt, whereupon the pawl engaged with one of the adjacent recesses and locks the nut without any further operation on 'thepart of theope rator. Should any force attempt to rotate the nuttothe left, the pawl 17 will be'urgedinto engagement with the stop or tooth formed by the side portion 13 of the recess, thereby 'obstructing further movement of the nut so that accidental rotation of the nutto the left on a right hand threaded bolt is impossible. Should it be necessary to remove the nut 'from the bolt, this may be accomv plished by removing the band 20 from the nut, and thepawl 17 and spring'19 from 7 cial form ofbolt or nut but may be incorporated in the conventional form of, bolt ;or

nut now in use, and may be used with entire What is claimed is l. A nut lock of the character describe comprising a bolt having an uninterrupted train of threads, a channel providedbetween "satisfaction on all bolts regardless of size.

the threads of the bolt, having a series of helically spaced recesses, a portion of said channel on one side of the recess being lower than the portion of the channel on the opposite side; of the recess, a nutarranged for engagement with the-bolt, said nut having a conical opening extending through one face thereof, aconical pawl movable in said Opening and arranged to project beyond the inner wall of the nut, aspr1ng urging said pawltoward the bolt and retaining means carried by the nut and adapted to-extend overthe outer endof the opening to prevent disengagementvof the spring andpawl from said opening.

' 2. A nut lock of the character described comprising a bolt having spaced depressions disposed between the threads of the bolt,

said bolthaving a guide channel extending from each depression and in the direction of the threads, the end of the channel adgacent the --depress1on corresponding in.

width to the diameter of the depression, said channels being inclined inwardly toward the depressions and gradually. decreasing in width and depth from the ends of'the chan-" nels to the opposite ends of said guides, a nut on the bolt, and means carried by the nutand' arranged to be guided into one of the depressions.

In testimony whereof signature. JNO. A. SAFKO.

I hereunto aflix my 

